Table 2. Recoveries and relative standard deviations of p-coumaric acid in HPLC analysis for validation

Concentration (μg/mL)	Recovery (%)	Mean±SD1)	RSD (%)2)
5	100.4	101.02±0.024	0.486
	101.3
	101.2
2.5	100.0	99.40±0.007	0.297
	99.7
	99.4
1	98.6	97.74±0.009	1.000
	96.7
	97.8

Each values was the mean±SD (n=3).
Relative standard deviation.